Past few years, power supply products had big change.
Users can see more and more power supply brands in the market and spec is going higher and higher.
Few years ago, the manufacturers started to promote APFC and after then the high end power supply uses modulized design.
These two years, power saving becomes the power supply new spec.
80 Plus is the most popular one to count power efficiency of power supply.

CORSAIR is long history memory brand. His DRAM product has very good reputation in the market.
Even though CORSAIR just enters power supply market for few years, its products are good quality and stability.
COASAIR divides his power supply into 3 series.
HX series is the highest. It’s in modulized design. High quality also means high performance.
TX series has non modulized design, bigger watt and fair price.
VX series watt is smaller than TX. It’s suitable for users who have budget concern.

Last year you could see many CORSAIR power supply discussion and most strings are HX750W.
Recently, CORSAIR announced HX850W, but this review is still HX750W.
750W in watt combination and market price will be more acceptable for users.

Let’s look at the package first. It’s a bigger paper box.
Currently, most power supply provides 3~5 years warranty. HX750W has 7 year warranty.
It shows COSAIR’s confidence with their quality system.
HX750w also passed 80 Plus Silver certificate. Now the most common spec is Bronze certificate.

HX750W product spec
+12V only 1 loop and total is 62A. The max is 744W.

The test configuration is GIGABYTE P55A-UD6, the very high end spec in LGA 1156 products.
In the beginning, I planned to use LGA 1336 with Gulftown CPU to do the power consumption test.
However, base on my recent experience, when OC LGA 1156 to full speed, the 12V consumption is extremely high.

Power Angle measure data is only for reference.
It only measures the approximate power consumption value. It’s not very accurate.
Even I didn’t use 3WAY SLI to reach the max 3D performance by full system load.
However, install one more GTX260 for PhysX also can increase some power consumption. It’s also some help for high loading test.

OCCT test result
CPU voltage variation
Standby is around 1.36V and full speed is always stay at 1.38V
CPU voltage vibration range is related to MB voltage quality.

3.3V
Max is 3.34V and it’s between 3.3~3.31V during test, about 1.20% range.

HX750W 3V and 5V voltage vibration range is very low.
It’s really impressive.
You have to pay attention to that 12V consumption is much higher as OC LGA 1156 to 4GHz.
12V voltage drop is only 1.04%. HX750W is the best in my past experience in using power supply.

The whole platform full speed loading is over 700W.
HX750W body temperature is still low, around 40 degree C by hand-touch feeling.
Also, power supply back temperature is around 55 degree C. It’s acceptable range.
12cm fan speed acoustic is hard to hear. It’s rare performance for such high power consumption as HX750W.

The last part is using accurate power meter to measure.
Standby
5V measurement is 5.14V. It’s a little higher than MB value, 5.08V.

As using meter, 5V and 12V are very still during standby and full speed.
Even the voltage change is only 0.01V. According to this measurement result, HX750W voltage stabilization is very high level.
Especially the 12V vibration range, very few power supplies can be as stay still as HX750W.

CORSAIR HX750W Conclusion
Good
1.CORSAIR package and accessories are good quality and also provides 7 years warranty.
2.Modulized design and 100% Japanese solid capacitors usage.
3.Passed 80PLUS Silver certificate and transfer efficiency is 90.02%
4. Temperature-controlled fan is very silent in normal usage. Even it’s hard to hear noise in full load condition.
5.Voltage vibration range is very low in high load. Especially the 12V is really impressive.

Someone think why I don’t use professional equipments to test power supply.
Maybe instrument test make readers feel more professional and credibility.
However, I think many brands power supply have made many test before selling.
If I use the same configuration as users real usage and test it in full load condition, it will be close to reality.
I used to suffer that a power supply passed professional instrument test, but has stability issue as installing to computer.

There is one more mystical thing. CORSAIR HX750W package shows 80 Plus Silver Certificate.
When I check in 80 Plus website, HX750W is Gold certificate and the power transfer efficiency is 90.02%.
CORSAIR designed it by Silver level, but some items have achieved Gold level.
It caused HX750W got Gold in 80 Plus, but still advertise it as Silver certificate.
This way is different as some brands only care about 80 Plus certificate but not product design and components.

CORSAIR HX750W owns high quality and high performance. Also, its package and components are good as well.
Plus above Silver level power efficiency, even though it’s 750W, but the power consumption is not much higher than low watt PSU during usage.
CORSAIR also provides 7 years warranty. You can see the vendor is very high confident with HX750W quality.
The CORSAIR HX750W price is around 150 USD.
But for middle high power supply, I think CORSAIR HX750W is still a very good C/P value product.
It’s in your must buy list if you are looking for same segment PSU.